Screen flickering and bad contrast when low light on s8

I recently purchased a samsung galaxy S8. It has less than 1 week out of the box.

Symptoms : when in low light I am experiencing some screen intensity flickering, like if the light was trying to adjust itself. It get worse when the background gets dark. I also see a very low contrast in darker parts, especially in youtube videos.

What I tried, from what I read on other threads :

-disable adaptative screen lightning : symptoms still there

-safe mode : symptoms still there

-empty phone cache from android boot menu : symptoms still there

-disabled overlay GPU (in dev options) to always force GPU screen processing : symptoms still there

-download an using screen filtering app : symptoms still there

Questions :

-Does someone else encounter such problem on this phone ?

-What other fixes can I try before recalling my product ?